Reported Reactions

Devices › Test, time, prothrombin

Device brand name · Prothrombin time monitor

CoaguChek XS PT Test PST: medical device reports filed with FDA

474 reports name it, 2021–2026. Manufacturer given most often on reports: Roche Diagnostics. Product code GJS.

474
device reports naming the brand
0% of all MAUDE reports · about 98 a year
12
reports, 12 months to August 2026
33 in the 12 months before
97.5%
classified as malfunction
92.3% across the product code
0%
classified as death, as reported
0 reports · not verified by FDA

FDA's MAUDE database holds 474 reports that name the brand "CoaguChek XS PT Test PST" (prothrombin time monitor), received between September 2021 and August 2026; the manufacturer given most often on reports is Roche Diagnostics. Spellings of one product vary from report to report.

12 reports arrived in the 12 months to August 2026, down 64% from 33 in the 12 months before. FDA releases MAUDE data monthly; reports can arrive months after an event, so the newest months grow in later releases. The event types recorded are malfunction (97.5%) and injury (2.5%); across all test, time, prothrombin reports (product code GJS) death is recorded in 0.2% and malfunction in 92.3%. Event type is the reporter's classification of the report, not a verified outcome.

The device problems coded most often are high test results (80%), low test results (9.1%) and incorrect, inadequate or imprecise result or readings (6.5%). The patient problems coded most often are ischemia stroke, stroke/cva and appropriate clinical signs, symptoms and conditions term/code not available. FDA states that "MDR data alone cannot be used to establish rates of events, evaluate a change in event rates over time or compare event rates between devices. The number of reports cannot be interpreted or used in isolation to reach conclusions about the existence, severity, or frequency of problems associated with devices." It adds that the reporting system "has limitations, including the potential submission of incomplete, inaccurate, untimely, unverified, or biased data."

Reports by month, five years

01224Sep 2021: 15Oct 2021: 7Nov 2021: 7Dec 2021: 112022Jan 2022: 5Feb 2022: 5Mar 2022: 15Apr 2022: 16May 2022: 20Jun 2022: 18Jul 2022: 12Aug 2022: 24Sep 2022: 15Oct 2022: 18Nov 2022: 17Dec 2022: 212023Jan 2023: 18Feb 2023: 22Mar 2023: 23Apr 2023: 22May 2023: 13Jun 2023: 17Jul 2023: 18Aug 2023: 8Sep 2023: 1Oct 2023: 5Nov 2023: 9Dec 2023: 52024Jan 2024: 7Feb 2024: 4Mar 2024: 4Apr 2024: 7May 2024: 1Jun 2024: 5Jul 2024: 7Aug 2024: 7Sep 2024: 7Oct 2024: 7Nov 2024: 7Dec 2024: 102025Jan 2025: 2Feb 2025: 0Mar 2025: 0Apr 2025: 0May 2025: 0Jun 2025: 0Jul 2025: 0Aug 2025: 0Sep 2025: 2Oct 2025: 1Nov 2025: 0Dec 2025: 22026Jan 2026: 0Feb 2026: 2Mar 2026: 0Apr 2026: 1May 2026: 2Jun 2026: 0Jul 2026: 1Aug 2026: 1

Reports by the month FDA received them. FDA releases MAUDE data monthly; reports can arrive months after an event, so the newest months grow in later releases.

By year received

0931862021: 4020212022: 18620222023: 16120232024: 7320242025: 720252026: 72026

Event type and report source

Event type, as classified on the report

Death0%0
Injury2.5%12
Malfunction97.5%462
Other0%0
Not given0%0

Who filed the report

Manufacturer report100%474
Voluntary report0%0
User facility report0%0
Distributor report0%0
Not given0%0

Grey bar: all 26,556 reports carrying product code GJS. Event type is the filer's classification and is not verified by FDA.

Device problems coded

Device problem (FDA code)ReportsShareShare across product code
High test results37980%32.6%
Low test results439.1%12.9%
Incorrect, inadequate or imprecise result or readings316.5%23.2%
Non reproducible results275.7%3.9%
Output problem40.8%0%
No device output20.4%0.2%
Circuit failure10.2%0.4%
Device difficult to setup or prepare10.2%0.3%
Environmental compatibility problem10.2%0%
High readingsreadings were too high10.2%0.2%
Incorrect measurementthe device measured wrongly10.2%0.3%
Low readingsreadings were too low10.2%0%

FDA's device problem codes as entered on the report; one report can carry several. Generic codes such as "no apparent adverse event" are left out.

Patient problems coded

Patient problem (FDA code)ReportsShare
Ischemia stroke20.4%
Stroke/cva20.4%
Appropriate clinical signs, symptoms and conditions term/code not available10.2%
Dizzinesslight-headedness or unsteadiness10.2%
Gastrointestinal hemorrhage10.2%
Thromboembolism10.2%
Thrombosis/thrombus10.2%

Patient problem codes are present mainly in reports filed since 2019 and are often blank.

In context

MeasureCoaguChek XS PT Test PSTProduct code GJSAll MAUDE reports
Reports47426,55626,136,888
Share of that pool—1.8%0%
Classified as death, per 1,000 reports029
Classified as injury2.5%6.5%36.2%
Classified as malfunction97.5%92.3%62.3%
Filed by the manufacturer100%99.3%94.9%

Shares are of reports, not of devices in use. FDA states that "MDR data alone cannot be used to establish rates of events, evaluate a change in event rates over time or compare event rates between devices. The number of reports cannot be interpreted or used in isolation to reach conclusions about the existence, severity, or frequency of problems associated with devices." It adds that the reporting system "has limitations, including the potential submission of incomplete, inaccurate, untimely, unverified, or biased data."

Other brands with product code GJS

BrandReportsLatest 12 monthsClassified as death
Coaguchek Xs System14,94520.1%
Inratio7,45200.1%
Inratio21,95900.2%
Inratio Pt/Inr Test Strips1,57600.8%
Coaguchek Xs Pt Test34120.3%
Protime Microcoagulation System75000.5%
I-Stat Pt/Inr Cartridge33000%
Dade Innovin19150%
Coaguchek S System2,67400%
Inratio Pt/Inr Test Strip16601.8%
Coaguchek Pt Test Strips92300.1%
Triage Cardiac Profiler Kit16800%
Accu-Chek Aviva Test Strips11,07300%
Triage Cardiac Panel 25 Test23301.3%

Ordered by report count for navigation only. FDA states that "MDR data alone cannot be used to establish rates of events, evaluate a change in event rates over time or compare event rates between devices. The number of reports cannot be interpreted or used in isolation to reach conclusions about the existence, severity, or frequency of problems associated with devices." It adds that the reporting system "has limitations, including the potential submission of incomplete, inaccurate, untimely, unverified, or biased data." FDA also states that "common products may have a higher number of adverse events due to the higher total number of people using the product."

Questions about CoaguChek XS PT Test PST reports

How many FDA reports name CoaguChek XS PT Test PST?

474 medical device reports in the openFDA MAUDE release of 28 Sep 2026, covering reports received through August 2026; 12 in the latest 12 months.

What kinds of events are reported?

malfunction (97.5%) and injury (2.5%). "Event type" is how the report was classified when filed: death, injury, malfunction or other.

What device problems are coded?

high test results (80%), low test results (9.1%), incorrect, inadequate or imprecise result or readings (6.5%), non reproducible results (5.7%) and output problem (0.8%). These are FDA's device problem codes as entered on the report.

Who files these reports?

manufacturer reports (100%). Manufacturers and user facilities are required to report; voluntary reports come from health professionals and the public.

Do these reports show that CoaguChek XS PT Test PST was at fault?

No. FDA states that "MDR data alone cannot be used to establish rates of events, evaluate a change in event rates over time or compare event rates between devices. The number of reports cannot be interpreted or used in isolation to reach conclusions about the existence, severity, or frequency of problems associated with devices." It adds that the reporting system "has limitations, including the potential submission of incomplete, inaccurate, untimely, unverified, or biased data." FDA adds that "a causal relationship cannot be established between product and reactions listed in a report."

How do I report a problem with a medical device?

Through FDA MedWatch (Form FDA 3500 for health professionals and consumers), or to the manufacturer. See the guide on how to report.

Where this comes from. Counts are built from the openFDA Device Adverse Event (MAUDE) bulk export released 28 Sep 2026, which holds reports FDA received through 31 Aug 2026. Brand, generic and manufacturer names are as written on the reports; product code names come from FDA's device classification. A report counts here when any device it lists carries this brand name after punctuation and capitalisation are normalised. No report narrative, lot number, patient detail or reporter identity is published. See the methodology and sources; FDA's record is authoritative, and corrections are handled within five working days.

Drug data (FAERS) through 30 Jun 2026; device data (MAUDE) through 31 Aug 2026. Not medical advice.